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                    常量
            
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                    网络编程
            
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                    面向对象
            
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                    1、go使用struct实现OOP
            
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                    2、方法
            
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                    3、封装
            
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                    4、继承
            
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                    5、接口
            
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                    6、多肽
            
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                    7、类型断言
            
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                    1、windows下安装golang环境
            
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                    2、webStorm安装go语言插件
            
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                    3、go的一些语法风格
            
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                    4、go语法-变量
            
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                    5、go语法--数据类型
            
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                    6、go的整数类型
            
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                    7、go的浮点类型
            
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                    8、go的字符类型
            
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                    9、go的bool类型
            
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                    10、go的string类型
            
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                    11、基本数据类型相互转换
            
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                    12、基本数据类型和string的转换
            
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                    13、go的指针
            
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                    14、go的标识符
            
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                    15、go的关键字
            
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                    16、go的运算符-算术运算
            
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                    17、比较、赋值、逻辑运算符
            
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                    18、运算符的优先级
            
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                    19、其他运算符
            
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                    20、go获取键盘输入
            
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                    21、进制、位运算
            
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                    22、if和switch语句
            
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                    23、for循环
            
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        <li class="chapter " data-level="1.4.35" data-path="../24、goto语句.html">
            
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                    24、goto语句
            
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                    25、函数1
            
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        <li class="chapter " data-level="1.4.37" data-path="../26、包-package.html">
            
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                    26、包-package
            
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                    27、init函数
            
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                    28、匿名函数
            
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                    29、闭包
            
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                    30、defer
            
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                    31、值传递和引用传递
            
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                    32、常用字符串函数
            
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                    33、时间和日期函数
            
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                    34、go语言的内置函数
            
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                    35、go语言的错误处理
            
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        <li class="chapter " data-level="1.4.47" data-path="../36、数组.html">
            
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                    36、数组
            
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        <li class="chapter " data-level="1.4.48" data-path="../37、切片slice.html">
            
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                    37、切片slice
            
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        <li class="chapter " data-level="1.4.49" data-path="../38、string和slice.html">
            
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                    38、string 和 slice
            
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        <li class="chapter " data-level="1.4.50" data-path="../39、二维数组.html">
            
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                    39、二维数组
            
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        <li class="chapter " data-level="1.4.51" data-path="../40、map的用法.html">
            
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                    40、map的用法
            
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        <li class="chapter " data-level="1.4.52" data-path="../41、获取命令行参数.html">
            
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                    41、获取命令行参数
            
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        <li class="chapter " data-level="1.5" data-path="../../Istio/">
            
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                    Istio
            
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        <li class="chapter " data-level="1.6" data-path="../../redis/">
            
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                    Redis
            
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        <li class="chapter " data-level="1.6.1" >
            
                <span>
            
                    
                    golang连接redis
            
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        <li class="chapter " data-level="1.6.1.1" data-path="../../redis/golang连接redis/1、go语言连接使用redis.html">
            
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                    1、go语言连接使用redis
            
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        <li class="chapter " data-level="1.6.1.2" data-path="../../redis/golang连接redis/2、redis连接池.html">
            
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                    2、redis连接池
            
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                    1、设置保护模式
            
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                    1、redis的安装
            
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                    2、redis数据库的命令操作
            
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                    3、string类型的操作
            
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                    4、hash类型的操作
            
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                    5、list类型的操作
            
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                    6、Set类型的操作
            
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                    7、docker安装redis
            
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                    8、redis集群搭建
            
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                    9、zset类型的操作
            
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                    1、稀疏数组
            
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                    2、队列
            
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                    3、单向链表
            
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                    4、双向链表
            
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                    5、单向环形链表
            
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                    6、约瑟夫问题
            
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                    7、选择排序
            
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                    8、插入排序
            
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                    9、快速排序法
            
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                    springCloud
            
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                    consul
            
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                    1、springcloud服务注册到consul
            
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                    3、springcloud使用consul做配置中心
            
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                    1、StreamingResponseBody问题
            
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                    1、新建springboot工程
            
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                    4、断路器hystrix的隔离策略
            
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                    5、hystrix的Dashboard和Turbine
            
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                                <div id="anchor-navigation-ex-navbar"><i class="fa fa-navicon"></i><ul><ul><ul><li><span class="title-icon "></span><a href="#&#x4E00;&#x3001;&#x6253;&#x5F00;&#x6587;&#x4EF6;&#x7684;&#x65B9;&#x5F0F;&#xFF1A;"><b>1.1.1. </b>&#x4E00;&#x3001;&#x6253;&#x5F00;&#x6587;&#x4EF6;&#x7684;&#x65B9;&#x5F0F;&#xFF1A;</a></li><li><span class="title-icon "></span><a href="#&#x4E8C;&#x3001;&#x793A;&#x4F8B;4&#x79CD;&#x65B9;&#x5F0F;&#x5199;&#x6587;&#x4EF6;&#xFF1A;"><b>1.1.2. </b>&#x4E8C;&#x3001;&#x793A;&#x4F8B;4&#x79CD;&#x65B9;&#x5F0F;&#x5199;&#x6587;&#x4EF6;&#xFF1A;</a></li><li><span class="title-icon "></span><a href="#&#x4E09;&#x3001;&#x4ECE;&#x4E00;&#x4E2A;&#x6587;&#x4EF6;&#x4E2D;&#x8BFB;&#x53D6;&#x5185;&#x5BB9;&#xFF0C;&#x5199;&#x5165;&#x53E6;&#x4E00;&#x4E2A;&#x6587;&#x4EF6;&#x3002;"><b>1.1.3. </b>&#x4E09;&#x3001;&#x4ECE;&#x4E00;&#x4E2A;&#x6587;&#x4EF6;&#x4E2D;&#x8BFB;&#x53D6;&#x5185;&#x5BB9;&#xFF0C;&#x5199;&#x5165;&#x53E6;&#x4E00;&#x4E2A;&#x6587;&#x4EF6;&#x3002;</a></li><li><span class="title-icon "></span><a href="#&#x56DB;&#x3001;&#x5224;&#x65AD;&#x6587;&#x4EF6;&#x662F;&#x5426;&#x5B58;&#x5728;&#x3002;"><b>1.1.4. </b>&#x56DB;&#x3001;&#x5224;&#x65AD;&#x6587;&#x4EF6;&#x662F;&#x5426;&#x5B58;&#x5728;&#x3002;</a></li><li><span class="title-icon "></span><a href="#&#x4E94;&#x3001;&#x62F7;&#x8D1D;&#x6587;&#x4EF6;&#x3002;"><b>1.1.5. </b>&#x4E94;&#x3001;&#x62F7;&#x8D1D;&#x6587;&#x4EF6;&#x3002;</a></li></ul></ul></ul></div><a href="#" id="anchorNavigationExGoTop"><i class="fa fa-arrow-up"></i></a><h3 id="&#x4E00;&#x3001;&#x6253;&#x5F00;&#x6587;&#x4EF6;&#x7684;&#x65B9;&#x5F0F;&#xFF1A;"><a name="&#x4E00;&#x3001;&#x6253;&#x5F00;&#x6587;&#x4EF6;&#x7684;&#x65B9;&#x5F0F;&#xFF1A;" class="anchor-navigation-ex-anchor" href="#&#x4E00;&#x3001;&#x6253;&#x5F00;&#x6587;&#x4EF6;&#x7684;&#x65B9;&#x5F0F;&#xFF1A;"><i class="fa fa-link" aria-hidden="true"></i></a>1.1.1. &#x4E00;&#x3001;&#x6253;&#x5F00;&#x6587;&#x4EF6;&#x7684;&#x65B9;&#x5F0F;&#xFF1A;</h3>
<p>&#x5199;&#x6587;&#x4EF6;&#x7684;&#x65F6;&#x5019;&#xFF0C;&#x8981;&#x4EE5;&#x5199;&#x65B9;&#x5F0F;open&#x6587;&#x4EF6;&#x3002;&#x6587;&#x6863;&#xFF1A;<a href="https://golang.org/pkg/os/" target="_blank">https://golang.org/pkg/os/</a></p>
<p>&#x4F7F;&#x7528;&#x7684;&#x51FD;&#x6570;&#xFF1A; <a href="https://golang.org/pkg/os/#OpenFile" target="_blank">func OpenFile(name string, flag int, perm FileMode) (*File, error)</a></p>
<p>&#x53C2;&#x6570;&#xFF1A;</p>
<ul>
<li>name&#xFF1A;&#x6587;&#x4EF6;&#x7684;&#x8DEF;&#x5F84;+&#x540D;&#x5B57;&#x3002;</li>
<li>int&#xFF1A;&#x6587;&#x4EF6;&#x7684;&#x6253;&#x5F00;&#x65B9;&#x5F0F;&#xFF0C;&#x53EA;&#x8BFB; O_RDONLY &#x3001;&#x53EA;&#x5199; O_WRONLY&#x3001;&#x8BFB;&#x5199; O_RDWR &#x7B49;&#xFF08;&#x53EF;&#x4EE5;&#x7EC4;&#x5408;&#x4F7F;&#x7528;&#xFF09;&#xFF0C;&#x5982;&#x4E0B; &#xFF1A;</li>
</ul>
<pre class="language-"><code class="lang-go"><span class="token keyword">const</span> <span class="token punctuation">(</span>
    O_RDONLY <span class="token builtin">int</span> <span class="token operator">=</span> syscall<span class="token punctuation">.</span>O_RDONLY <span class="token comment">// &#x53EA;&#x8BFB;&#x6A21;&#x5F0F;&#x6253;&#x5F00;&#x6587;&#x4EF6;</span>
    O_WRONLY <span class="token builtin">int</span> <span class="token operator">=</span> syscall<span class="token punctuation">.</span>O_WRONLY <span class="token comment">// &#x53EA;&#x5199;&#x6A21;&#x5F0F;&#x6253;&#x5F00;&#x6587;&#x4EF6;</span>
    O_RDWR   <span class="token builtin">int</span> <span class="token operator">=</span> syscall<span class="token punctuation">.</span>O_RDWR   <span class="token comment">// &#x8BFB;&#x5199;&#x6A21;&#x5F0F;&#x6253;&#x5F00;&#x6587;&#x4EF6;</span>
    O_APPEND <span class="token builtin">int</span> <span class="token operator">=</span> syscall<span class="token punctuation">.</span>O_APPEND <span class="token comment">// &#x5199;&#x64CD;&#x4F5C;&#x65F6;&#x5C06;&#x6570;&#x636E;&#x9644;&#x52A0;&#x5230;&#x6587;&#x4EF6;&#x5C3E;&#x90E8;</span>
    O_CREATE <span class="token builtin">int</span> <span class="token operator">=</span> syscall<span class="token punctuation">.</span>O_CREAT  <span class="token comment">// &#x5982;&#x679C;&#x4E0D;&#x5B58;&#x5728;&#x5C06;&#x521B;&#x5EFA;&#x4E00;&#x4E2A;&#x65B0;&#x6587;&#x4EF6;</span>
    O_EXCL   <span class="token builtin">int</span> <span class="token operator">=</span> syscall<span class="token punctuation">.</span>O_EXCL   <span class="token comment">// &#x548C;O_CREATE&#x914D;&#x5408;&#x4F7F;&#x7528;&#xFF0C;&#x6587;&#x4EF6;&#x5FC5;&#x987B;&#x4E0D;&#x5B58;&#x5728;</span>
    O_SYNC   <span class="token builtin">int</span> <span class="token operator">=</span> syscall<span class="token punctuation">.</span>O_SYNC   <span class="token comment">// &#x6253;&#x5F00;&#x6587;&#x4EF6;&#x7528;&#x4E8E;&#x540C;&#x6B65;I/O</span>
    O_TRUNC  <span class="token builtin">int</span> <span class="token operator">=</span> syscall<span class="token punctuation">.</span>O_TRUNC  <span class="token comment">// &#x5982;&#x679C;&#x53EF;&#x80FD;&#xFF0C;&#x6253;&#x5F00;&#x65F6;&#x6E05;&#x7A7A;&#x6587;&#x4EF6;</span>
<span class="token punctuation">)</span>
</code></pre>
<ul>
<li>perm &#xFF1A;&#x8FD9;&#x4E2A;&#x662F;&#x63A7;&#x5236;&#x6587;&#x4EF6;&#x7684;&#x6743;&#x9650;&#xFF0C;&#x5728;linux&#x7CFB;&#x7EDF;&#x4E0B;&#x6709;&#x7528;&#x3002;</li>
</ul>
<h3 id="&#x4E8C;&#x3001;&#x793A;&#x4F8B;4&#x79CD;&#x65B9;&#x5F0F;&#x5199;&#x6587;&#x4EF6;&#xFF1A;"><a name="&#x4E8C;&#x3001;&#x793A;&#x4F8B;4&#x79CD;&#x65B9;&#x5F0F;&#x5199;&#x6587;&#x4EF6;&#xFF1A;" class="anchor-navigation-ex-anchor" href="#&#x4E8C;&#x3001;&#x793A;&#x4F8B;4&#x79CD;&#x65B9;&#x5F0F;&#x5199;&#x6587;&#x4EF6;&#xFF1A;"><i class="fa fa-link" aria-hidden="true"></i></a>1.1.2. &#x4E8C;&#x3001;&#x793A;&#x4F8B;4&#x79CD;&#x65B9;&#x5F0F;&#x5199;&#x6587;&#x4EF6;&#xFF1A;</h3>
<h4 id="1&#x3001;&#x521B;&#x5EFA;&#x4E00;&#x4E2A;&#x6587;&#x4EF6;&#xFF0C;&#x5411;&#x6587;&#x4EF6;&#x91CC;&#x9762;&#x5199;&#x4E00;&#x4E9B;&#x5185;&#x5BB9;&#x3002;"><a name="1&#x3001;&#x521B;&#x5EFA;&#x4E00;&#x4E2A;&#x6587;&#x4EF6;&#xFF0C;&#x5411;&#x6587;&#x4EF6;&#x91CC;&#x9762;&#x5199;&#x4E00;&#x4E9B;&#x5185;&#x5BB9;&#x3002;" class="anchor-navigation-ex-anchor" href="#1&#x3001;&#x521B;&#x5EFA;&#x4E00;&#x4E2A;&#x6587;&#x4EF6;&#xFF0C;&#x5411;&#x6587;&#x4EF6;&#x91CC;&#x9762;&#x5199;&#x4E00;&#x4E9B;&#x5185;&#x5BB9;&#x3002;"><i class="fa fa-link" aria-hidden="true"></i></a>1&#x3001;&#x521B;&#x5EFA;&#x4E00;&#x4E2A;&#x6587;&#x4EF6;&#xFF0C;&#x5411;&#x6587;&#x4EF6;&#x91CC;&#x9762;&#x5199;&#x4E00;&#x4E9B;&#x5185;&#x5BB9;&#x3002;</h4>
<pre class="language-"><code class="lang-go"><span class="token keyword">func</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    filePath <span class="token operator">:=</span> <span class="token string">&quot;C:/Users/Administrator/Desktop/testWrite.txt&quot;</span><span class="token punctuation">;</span>
    <span class="token comment">// O_CREATE &#x5982;&#x679C;&#x4E0D;&#x5B58;&#x5728;&#x5C06;&#x521B;&#x5EFA;&#x4E00;&#x4E2A;&#x65B0;&#x6587;&#x4EF6;&#xFF0C;&#x5E76;&#x4E14;&#x4EE5;&#x5199;(O_WRONLY)&#x7684;&#x65B9;&#x5F0F;&#x6253;&#x5F00;&#x6587;&#x4EF6;</span>
    <span class="token comment">// 0666 &#x8FD9;&#x4E2A;&#x662F;&#x6587;&#x4EF6;&#x7684;&#x6743;&#x9650;&#xFF0C;&#x6240;&#x6709;&#x8005;&#x3001;&#x6240;&#x5728;&#x7EC4;&#x3001;&#x5176;&#x4ED6;&#x4EBA;</span>
    file<span class="token punctuation">,</span> err <span class="token operator">:=</span> os<span class="token punctuation">.</span><span class="token function">OpenFile</span><span class="token punctuation">(</span>filePath<span class="token punctuation">,</span>os<span class="token punctuation">.</span>O_WRONLY <span class="token operator">|</span> os<span class="token punctuation">.</span>O_CREATE<span class="token punctuation">,</span><span class="token number">0666</span><span class="token punctuation">)</span>
    <span class="token keyword">if</span> err <span class="token operator">!=</span> <span class="token boolean">nil</span> <span class="token punctuation">{</span>
        fmt<span class="token punctuation">.</span><span class="token function">Println</span><span class="token punctuation">(</span><span class="token string">&quot;&#x6253;&#x5F00;&#x6587;&#x4EF6;&#x9519;&#x8BEF;&#x3002;&#x3002;&#x3002;&quot;</span><span class="token punctuation">)</span>
        <span class="token keyword">return</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">defer</span> file<span class="token punctuation">.</span><span class="token function">Close</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token comment">//&#x5173;&#x95ED;&#x6587;&#x4EF6;</span>

    writer <span class="token operator">:=</span> bufio<span class="token punctuation">.</span><span class="token function">NewWriter</span><span class="token punctuation">(</span>file<span class="token punctuation">)</span>
    <span class="token keyword">for</span> i<span class="token operator">:=</span><span class="token number">0</span><span class="token punctuation">;</span> i<span class="token operator">&lt;</span><span class="token number">5</span><span class="token punctuation">;</span> i<span class="token operator">++</span> <span class="token punctuation">{</span>
        writer<span class="token punctuation">.</span><span class="token function">WriteString</span><span class="token punctuation">(</span><span class="token string">&quot;&#x4F60;&#x597D; \r\n&quot;</span><span class="token punctuation">)</span>
    <span class="token punctuation">}</span>

     <span class="token comment">// &#x56E0;&#x4E3A; writer &#x5E26;&#x7F13;&#x5B58;&#xFF0C;&#x6570;&#x636E;&#x5148;&#x5199;&#x5230;writer&#x4E2D;&#xFF0C;&#x8D85;&#x51FA;&#x7F13;&#x5B58;&#x540E;&#x624D;&#x5199;&#x5230;&#x786C;&#x76D8;&#x3002;</span>
     <span class="token comment">// &#x6240;&#x4EE5;&#x6700;&#x540E;&#x9700;&#x8981;&#x628A;&#x7F13;&#x5B58;&#x4E2D;&#x5269;&#x4F59;&#x7684;&#x6570;&#x636E;Flush()&#x5230;&#x786C;&#x76D8;</span>
    writer<span class="token punctuation">.</span><span class="token function">Flush</span><span class="token punctuation">(</span><span class="token punctuation">)</span>

<span class="token punctuation">}</span>
</code></pre>
<blockquote>
<p>&#x4F7F;&#x7528;&#x5230;&#x7684;API&#xFF1A;</p>
<p>1&#x3001;&#x6253;&#x5F00;&#x6587;&#x4EF6;&#xFF1A;<code>os.OpenFile(filePath,os.O_WRONLY | os.O_CREATE,0666)</code>  &#x3002;</p>
<p>O_CREATE &#x5982;&#x679C;&#x4E0D;&#x5B58;&#x5728;&#x5C06;&#x521B;&#x5EFA;&#x4E00;&#x4E2A;&#x65B0;&#x6587;&#x4EF6;&#xFF0C;&#x5E76;&#x4E14;&#x4EE5;&#x5199;(O_WRONLY)&#x7684;&#x65B9;&#x5F0F;&#x6253;&#x5F00;&#x6587;&#x4EF6;&#x3002;&#x5982;&#x679C;&#x6587;&#x4EF6;&#x5B58;&#x5728;&#xFF0C;&#x5C06;&#x88AB;&#x8986;&#x76D6;&#x3002;</p>
<p>0666 &#x8FD9;&#x4E2A;&#x662F;&#x6587;&#x4EF6;&#x7684;&#x6743;&#x9650;&#xFF0C;&#x662F;&#x5426;&#x76EE;&#x5F55;&#xFF0C;&#x6240;&#x6709;&#x8005;&#x3001;&#x6240;&#x5728;&#x7EC4;&#x3001;&#x5176;&#x4ED6;&#x4EBA;&#x3002;</p>
<p>2&#x3001;&#x5173;&#x95ED;&#x6587;&#x4EF6; &#xFF1A;file.Close()&#x3002;</p>
<p>3&#x3001;&#x521B;&#x5EFA;&#x5199;&#x7F13;&#x51B2;&#xFF1A;bufio.NewWriter(file)</p>
<p>4&#x3001;&#x5199;&#x6587;&#x4EF6;&#x5185;&#x5BB9;&#xFF1A;writer.WriteString(&quot;&#x4F60;&#x597D; \r\n&quot;)</p>
<p>5&#x3001;&#x628A;&#x5185;&#x5BB9;&#x5237;&#x65B0;&#x5230;&#x786C;&#x76D8;&#xFF1A;writer.Flush()&#xFF0C;&#x56E0;&#x4E3A; writer &#x5E26;&#x7F13;&#x5B58;&#xFF0C;&#x6570;&#x636E;&#x5148;&#x5199;&#x5230;writer&#x4E2D;&#xFF0C;&#x8D85;&#x51FA;&#x7F13;&#x5B58;&#x540E;&#x624D;&#x5199;&#x5230;&#x786C;&#x76D8;&#x3002;&#x6240;&#x4EE5;&#x6700;&#x540E;&#x9700;&#x8981;&#x628A;&#x7F13;&#x5B58;&#x4E2D;&#x5269;&#x4F59;&#x7684;&#x6570;&#x636E;Flush()&#x5230;&#x786C;&#x76D8;&#x3002;</p>
</blockquote>
<h4 id="2&#x3001;&#x6253;&#x5F00;&#x4E00;&#x4E2A;&#x5DF2;&#x7ECF;&#x5B58;&#x5728;&#x7684;&#x6587;&#x4EF6;&#xFF0C;&#x6E05;&#x7A7A;&#x539F;&#x6765;&#x7684;&#x5185;&#x5BB9;&#xFF0C;&#x7136;&#x540E;&#x5411;&#x6587;&#x4EF6;&#x91CC;&#x9762;&#x5199;&#x6570;&#x636E;&#x3002;"><a name="2&#x3001;&#x6253;&#x5F00;&#x4E00;&#x4E2A;&#x5DF2;&#x7ECF;&#x5B58;&#x5728;&#x7684;&#x6587;&#x4EF6;&#xFF0C;&#x6E05;&#x7A7A;&#x539F;&#x6765;&#x7684;&#x5185;&#x5BB9;&#xFF0C;&#x7136;&#x540E;&#x5411;&#x6587;&#x4EF6;&#x91CC;&#x9762;&#x5199;&#x6570;&#x636E;&#x3002;" class="anchor-navigation-ex-anchor" href="#2&#x3001;&#x6253;&#x5F00;&#x4E00;&#x4E2A;&#x5DF2;&#x7ECF;&#x5B58;&#x5728;&#x7684;&#x6587;&#x4EF6;&#xFF0C;&#x6E05;&#x7A7A;&#x539F;&#x6765;&#x7684;&#x5185;&#x5BB9;&#xFF0C;&#x7136;&#x540E;&#x5411;&#x6587;&#x4EF6;&#x91CC;&#x9762;&#x5199;&#x6570;&#x636E;&#x3002;"><i class="fa fa-link" aria-hidden="true"></i></a>2&#x3001;&#x6253;&#x5F00;&#x4E00;&#x4E2A;&#x5DF2;&#x7ECF;&#x5B58;&#x5728;&#x7684;&#x6587;&#x4EF6;&#xFF0C;&#x6E05;&#x7A7A;&#x539F;&#x6765;&#x7684;&#x5185;&#x5BB9;&#xFF0C;&#x7136;&#x540E;&#x5411;&#x6587;&#x4EF6;&#x91CC;&#x9762;&#x5199;&#x6570;&#x636E;&#x3002;</h4>
<p>&#x5982;&#x679C;&#x5DF2;&#x7ECF;&#x77E5;&#x9053;&#x6587;&#x4EF6;&#x5B58;&#x5728;&#xFF0C;&#x60F3;&#x8986;&#x76D6;&#x539F;&#x6765;&#x7684;&#x5185;&#x5BB9;&#xFF0C;&#x53EF;&#x4EE5;&#x4F7F;&#x7528;&#x4E0B;&#x9762;&#x7684;&#x65B9;&#x5F0F;&#x6253;&#x5F00;&#x6587;&#x4EF6;&#x3002;(&#x6587;&#x4EF6;&#x4E0D;&#x5B58;&#x5728;&#xFF0C;&#x4F1A;&#x51FA;&#x73B0;err&#x9519;&#x8BEF;)</p>
<pre class="language-"><code class="lang-go">file<span class="token punctuation">,</span> err <span class="token operator">:=</span> os<span class="token punctuation">.</span><span class="token function">OpenFile</span><span class="token punctuation">(</span>filePath<span class="token punctuation">,</span>os<span class="token punctuation">.</span>O_WRONLY <span class="token operator">|</span> os<span class="token punctuation">.</span>O_TRUNC<span class="token punctuation">,</span><span class="token number">0666</span><span class="token punctuation">)</span>
</code></pre>
<blockquote>
<p>os.O_TRUNC &#x8868;&#x793A;&#x6E05;&#x7A7A;&#x539F;&#x6765;&#x7684;&#x5185;&#x5BB9;&#x3002;</p>
</blockquote>
<h4 id="3&#x3001;&#x5411;&#x5DF2;&#x7ECF;&#x5B58;&#x5728;&#x7684;&#x6587;&#x4EF6;&#x672B;&#x5C3E;&#x8FFD;&#x52A0;&#x5185;&#x5BB9;&#x3002;"><a name="3&#x3001;&#x5411;&#x5DF2;&#x7ECF;&#x5B58;&#x5728;&#x7684;&#x6587;&#x4EF6;&#x672B;&#x5C3E;&#x8FFD;&#x52A0;&#x5185;&#x5BB9;&#x3002;" class="anchor-navigation-ex-anchor" href="#3&#x3001;&#x5411;&#x5DF2;&#x7ECF;&#x5B58;&#x5728;&#x7684;&#x6587;&#x4EF6;&#x672B;&#x5C3E;&#x8FFD;&#x52A0;&#x5185;&#x5BB9;&#x3002;"><i class="fa fa-link" aria-hidden="true"></i></a>3&#x3001;&#x5411;&#x5DF2;&#x7ECF;&#x5B58;&#x5728;&#x7684;&#x6587;&#x4EF6;&#x672B;&#x5C3E;&#x8FFD;&#x52A0;&#x5185;&#x5BB9;&#x3002;</h4>
<p>&#x5411;&#x5DF2;&#x7ECF;&#x5B58;&#x5728;&#x7684;&#x6587;&#x4EF6;&#x672B;&#x5C3E;&#x8FFD;&#x52A0;&#x5185;&#x5BB9;&#xFF0C;&#x6253;&#x5F00;&#x65B9;&#x5F0F;&#x5982;&#x4E0B;&#xFF1A;(&#x6587;&#x4EF6;&#x4E0D;&#x5B58;&#x5728;&#xFF0C;&#x4F1A;&#x51FA;&#x73B0;err&#x9519;&#x8BEF;)</p>
<pre class="language-"><code class="lang-go">file<span class="token punctuation">,</span> err <span class="token operator">:=</span> os<span class="token punctuation">.</span><span class="token function">OpenFile</span><span class="token punctuation">(</span>filePath<span class="token punctuation">,</span>os<span class="token punctuation">.</span>O_WRONLY <span class="token operator">|</span> os<span class="token punctuation">.</span>O_APPEND<span class="token punctuation">,</span><span class="token number">0666</span><span class="token punctuation">)</span>
</code></pre>
<blockquote>
<p>os.O_APPEND &#x8868;&#x793A;&#x5411;&#x672B;&#x5C3E;&#x8FFD;&#x52A0;&#x5185;&#x5BB9;&#x3002;</p>
</blockquote>
<h4 id="4&#x3001;&#x8BFB;&#x53D6;&#x5DF2;&#x7ECF;&#x5B58;&#x5728;&#x7684;&#x6587;&#x4EF6;&#xFF0C;&#x5E76;&#x4E14;&#x5411;&#x6587;&#x4EF6;&#x672B;&#x5C3E;&#x8FFD;&#x52A0;&#x5185;&#x5BB9;&#x3002;"><a name="4&#x3001;&#x8BFB;&#x53D6;&#x5DF2;&#x7ECF;&#x5B58;&#x5728;&#x7684;&#x6587;&#x4EF6;&#xFF0C;&#x5E76;&#x4E14;&#x5411;&#x6587;&#x4EF6;&#x672B;&#x5C3E;&#x8FFD;&#x52A0;&#x5185;&#x5BB9;&#x3002;" class="anchor-navigation-ex-anchor" href="#4&#x3001;&#x8BFB;&#x53D6;&#x5DF2;&#x7ECF;&#x5B58;&#x5728;&#x7684;&#x6587;&#x4EF6;&#xFF0C;&#x5E76;&#x4E14;&#x5411;&#x6587;&#x4EF6;&#x672B;&#x5C3E;&#x8FFD;&#x52A0;&#x5185;&#x5BB9;&#x3002;"><i class="fa fa-link" aria-hidden="true"></i></a>4&#x3001;&#x8BFB;&#x53D6;&#x5DF2;&#x7ECF;&#x5B58;&#x5728;&#x7684;&#x6587;&#x4EF6;&#xFF0C;&#x5E76;&#x4E14;&#x5411;&#x6587;&#x4EF6;&#x672B;&#x5C3E;&#x8FFD;&#x52A0;&#x5185;&#x5BB9;&#x3002;</h4>
<pre class="language-"><code class="lang-go">    filePath <span class="token operator">:=</span> <span class="token string">&quot;C:/Users/Administrator/Desktop/testWrite.txt&quot;</span><span class="token punctuation">;</span>
    <span class="token comment">// O_CREATE</span>
    file<span class="token punctuation">,</span> err <span class="token operator">:=</span> os<span class="token punctuation">.</span><span class="token function">OpenFile</span><span class="token punctuation">(</span>filePath<span class="token punctuation">,</span>os<span class="token punctuation">.</span>O_RDWR <span class="token operator">|</span> os<span class="token punctuation">.</span>O_APPEND<span class="token punctuation">,</span><span class="token number">0666</span><span class="token punctuation">)</span>
    <span class="token keyword">if</span> err <span class="token operator">!=</span> <span class="token boolean">nil</span> <span class="token punctuation">{</span>
        fmt<span class="token punctuation">.</span><span class="token function">Println</span><span class="token punctuation">(</span><span class="token string">&quot;&#x6253;&#x5F00;&#x6587;&#x4EF6;&#x9519;&#x8BEF;&#x3002;&#x3002;&#x3002;&quot;</span><span class="token punctuation">)</span>
        <span class="token keyword">return</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">defer</span> file<span class="token punctuation">.</span><span class="token function">Close</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token comment">//&#x5173;&#x95ED;&#x6587;&#x4EF6;</span>

    <span class="token comment">// &#x521B;&#x5EFA;&#x4E00;&#x4E2A;reader&#xFF0C;&#x9ED8;&#x8BA4;&#x5E26;4096&#x4E2A;&#x5B57;&#x8282;&#x7684;&#x7F13;&#x51B2;&#x3002;</span>
    reader <span class="token operator">:=</span> bufio<span class="token punctuation">.</span><span class="token function">NewReader</span><span class="token punctuation">(</span>file<span class="token punctuation">)</span>
    <span class="token comment">//&#x5FAA;&#x73AF;&#x8BFB;&#x53D6;&#x6587;&#x4EF6;&#x7684;&#x5185;&#x5BB9;</span>
    <span class="token keyword">for</span> <span class="token punctuation">{</span>
        <span class="token comment">// &#x8BFB;&#x5230;&#x4E00;&#x4E2A;&#x6362;&#x884C;\n&#x5C31;&#x7ED3;&#x675F;&#x3002;&#x5F53;&#x524D;&#x53EA;&#x8BFB;&#x53D6;&#x4E00;&#x884C;&#x3002;&#x5B58;&#x50A8;&#x5230;str&#x53D8;&#x91CF;&#x3002;</span>
        str<span class="token punctuation">,</span> readErr <span class="token operator">:=</span> reader<span class="token punctuation">.</span><span class="token function">ReadString</span><span class="token punctuation">(</span><span class="token string">&apos;\n&apos;</span><span class="token punctuation">)</span>

        fmt<span class="token punctuation">.</span><span class="token function">Print</span><span class="token punctuation">(</span>str<span class="token punctuation">)</span> <span class="token comment">//&#x8F93;&#x51FA;&#x8BFB;&#x53D6;&#x5230;&#x7684;&#x5185;&#x5BB9;</span>
        <span class="token keyword">if</span> readErr <span class="token operator">==</span> io<span class="token punctuation">.</span>EOF <span class="token punctuation">{</span> <span class="token comment">// io.EOF &#x8868;&#x793A;&#x6587;&#x4EF6;&#x672B;&#x5C3E;</span>
            fmt<span class="token punctuation">.</span><span class="token function">Println</span><span class="token punctuation">(</span><span class="token string">&quot;&#x8BFB;&#x53D6;&#x5B8C;&#x6BD5;&#x3002;&#x3002;&#x3002;&#x3002;&quot;</span><span class="token punctuation">)</span>
            <span class="token keyword">break</span>
        <span class="token punctuation">}</span>

    <span class="token punctuation">}</span>

    <span class="token comment">//  &#x5199;&#x6587;&#x4EF6;</span>
    writer <span class="token operator">:=</span> bufio<span class="token punctuation">.</span><span class="token function">NewWriter</span><span class="token punctuation">(</span>file<span class="token punctuation">)</span>
    <span class="token keyword">for</span> i<span class="token operator">:=</span><span class="token number">0</span><span class="token punctuation">;</span> i<span class="token operator">&lt;</span><span class="token number">5</span><span class="token punctuation">;</span> i<span class="token operator">++</span> <span class="token punctuation">{</span>
        writer<span class="token punctuation">.</span><span class="token function">WriteString</span><span class="token punctuation">(</span><span class="token string">&quot;&#x4F60;&#x597D;123tttxx&#x8FFD;&#x52A0; \r\n&quot;</span><span class="token punctuation">)</span>
    <span class="token punctuation">}</span>
     <span class="token comment">// &#x56E0;&#x4E3A; writer &#x5E26;&#x7F13;&#x5B58;&#xFF0C;&#x6570;&#x636E;&#x5148;&#x5199;&#x5230;writer&#x4E2D;&#xFF0C;&#x8D85;&#x51FA;&#x7F13;&#x5B58;&#x540E;&#x624D;&#x5199;&#x5230;&#x786C;&#x76D8;&#x3002;</span>
     <span class="token comment">// &#x6240;&#x4EE5;&#x6700;&#x540E;&#x9700;&#x8981;&#x628A;&#x7F13;&#x5B58;&#x4E2D;&#x5269;&#x4F59;&#x7684;&#x6570;&#x636E;Flush()&#x5230;&#x786C;&#x76D8;</span>
    writer<span class="token punctuation">.</span><span class="token function">Flush</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
</code></pre>
<blockquote>
<p>&#x6CE8;&#x610F;&#xFF1A;&#x8BFB;&#x5199;os.O_RDWR &#x548C; &#x8FFD;&#x52A0; os.O_APPEND&#xFF0C;&#x8981;&#x5148;&#x8BFB;&#xFF0C;&#x4E0D;&#x80FD;&#x5148;&#x5199;&#x3002;&#x5982;&#x679C;&#x5148;&#x5199;&#x6587;&#x4EF6;&#xFF0C;&#x90A3;&#x8BFB;&#x51FA;&#x6765;&#x7684;&#x662F;&#x7A7A;&#x5B57;&#x7B26;&#x4E32;&#x3002;</p>
</blockquote>
<h3 id="&#x4E09;&#x3001;&#x4ECE;&#x4E00;&#x4E2A;&#x6587;&#x4EF6;&#x4E2D;&#x8BFB;&#x53D6;&#x5185;&#x5BB9;&#xFF0C;&#x5199;&#x5165;&#x53E6;&#x4E00;&#x4E2A;&#x6587;&#x4EF6;&#x3002;"><a name="&#x4E09;&#x3001;&#x4ECE;&#x4E00;&#x4E2A;&#x6587;&#x4EF6;&#x4E2D;&#x8BFB;&#x53D6;&#x5185;&#x5BB9;&#xFF0C;&#x5199;&#x5165;&#x53E6;&#x4E00;&#x4E2A;&#x6587;&#x4EF6;&#x3002;" class="anchor-navigation-ex-anchor" href="#&#x4E09;&#x3001;&#x4ECE;&#x4E00;&#x4E2A;&#x6587;&#x4EF6;&#x4E2D;&#x8BFB;&#x53D6;&#x5185;&#x5BB9;&#xFF0C;&#x5199;&#x5165;&#x53E6;&#x4E00;&#x4E2A;&#x6587;&#x4EF6;&#x3002;"><i class="fa fa-link" aria-hidden="true"></i></a>1.1.3. &#x4E09;&#x3001;&#x4ECE;&#x4E00;&#x4E2A;&#x6587;&#x4EF6;&#x4E2D;&#x8BFB;&#x53D6;&#x5185;&#x5BB9;&#xFF0C;&#x5199;&#x5165;&#x53E6;&#x4E00;&#x4E2A;&#x6587;&#x4EF6;&#x3002;</h3>
<p>&#x4F7F;&#x7528; ioutil &#x5305;&#xFF0C;&#x628A;&#x4E00;&#x4E2A;&#x6587;&#x4EF6;&#x7684;&#x5185;&#x5BB9;&#x8BFB;&#x53D6;&#x51FA;&#x6765;&#xFF0C;&#x5199;&#x5165;&#x53E6;&#x4E00;&#x4E2A;&#x6587;&#x4EF6;&#x3002;</p>
<pre class="language-"><code class="lang-go">    <span class="token comment">// &#x8BFB;&#x6587;&#x4EF6;</span>
    data<span class="token punctuation">,</span> err <span class="token operator">:=</span> ioutil<span class="token punctuation">.</span><span class="token function">ReadFile</span><span class="token punctuation">(</span><span class="token string">&quot;C:/Users/Administrator/Desktop/test.txt&quot;</span><span class="token punctuation">)</span>
    <span class="token keyword">if</span> err <span class="token operator">!=</span> <span class="token boolean">nil</span> <span class="token punctuation">{</span>
        fmt<span class="token punctuation">.</span><span class="token function">Printf</span><span class="token punctuation">(</span><span class="token string">&quot;&#x8BFB;&#x53D6;&#x6587;&#x4EF6;&#x5931;&#x8D25;&#x3002;&#x3002;&#x3002;&#x3002;%v&quot;</span><span class="token punctuation">,</span>err<span class="token punctuation">)</span>
    <span class="token punctuation">}</span>

    <span class="token comment">// &#x5199;&#x6587;&#x4EF6;</span>
    destPath <span class="token operator">:=</span> <span class="token string">&quot;C:/Users/Administrator/Desktop/dest.txt&quot;</span>
    writeErr <span class="token operator">:=</span> ioutil<span class="token punctuation">.</span><span class="token function">WriteFile</span><span class="token punctuation">(</span>destPath<span class="token punctuation">,</span> data<span class="token punctuation">,</span> <span class="token number">0666</span><span class="token punctuation">)</span>
    <span class="token keyword">if</span> writeErr <span class="token operator">!=</span> <span class="token boolean">nil</span> <span class="token punctuation">{</span>
        fmt<span class="token punctuation">.</span><span class="token function">Printf</span><span class="token punctuation">(</span><span class="token string">&quot;&#x5199;&#x6587;&#x4EF6;&#x5931;&#x8D25;&#x3002;&#x3002;&#x3002;&#x3002;%v&quot;</span><span class="token punctuation">,</span>err<span class="token punctuation">)</span>
    <span class="token punctuation">}</span>
</code></pre>
<blockquote>
<p>&#x8BF4;&#x660E;&#xFF1A;</p>
<p>1&#x3001;&#x5982;&#x679C;&#x8BFB;&#x53D6;&#x7684;&#x6587;&#x4EF6; test.txt &#x4E0D;&#x5B58;&#x5728;&#xFF0C;&#x4F1A;&#x62A5; err &#x9519;&#x8BEF;&#x3002;</p>
<p>2&#x3001;&#x5199;&#x7684;&#x6587;&#x4EF6; dest.txt &#x53EF;&#x4EE5;&#x4E0D;&#x5B58;&#x5728;&#xFF0C;&#x5982;&#x679C;&#x6587;&#x4EF6; dest.txt &#x5B58;&#x5728;&#xFF0C;&#x539F;&#x6765;&#x7684;&#x5185;&#x5BB9;&#x4F1A;&#x88AB;&#x6E05;&#x7A7A;&#xFF0C;&#x5199;&#x5165;&#x65B0;&#x7684;&#x5185;&#x5BB9;&#x3002;</p>
</blockquote>
<h3 id="&#x56DB;&#x3001;&#x5224;&#x65AD;&#x6587;&#x4EF6;&#x662F;&#x5426;&#x5B58;&#x5728;&#x3002;"><a name="&#x56DB;&#x3001;&#x5224;&#x65AD;&#x6587;&#x4EF6;&#x662F;&#x5426;&#x5B58;&#x5728;&#x3002;" class="anchor-navigation-ex-anchor" href="#&#x56DB;&#x3001;&#x5224;&#x65AD;&#x6587;&#x4EF6;&#x662F;&#x5426;&#x5B58;&#x5728;&#x3002;"><i class="fa fa-link" aria-hidden="true"></i></a>1.1.4. &#x56DB;&#x3001;&#x5224;&#x65AD;&#x6587;&#x4EF6;&#x662F;&#x5426;&#x5B58;&#x5728;&#x3002;</h3>
<p>&#x4F7F;&#x7528;os.Stat &#x83B7;&#x53D6;&#x6587;&#x4EF6;&#x6216;&#x6587;&#x4EF6;&#x5939;&#x7684;&#x4FE1;&#x606F;&#x3002;&#x5982;&#x679C;&#x6709;&#x9519;&#x8BEF;&#xFF0C;&#x5224;&#x65AD;&#x662F;&#x4E0D;&#x662F;&#x6587;&#x4EF6;&#x4E0D;&#x5B58;&#x5728;os.IsNotExist &#x7684;&#x9519;&#x8BEF;&#x3002;&#x5982;&#x4E0B;&#xFF1A;</p>
<pre class="language-"><code class="lang-go">    info<span class="token punctuation">,</span> err <span class="token operator">:=</span> os<span class="token punctuation">.</span><span class="token function">Stat</span><span class="token punctuation">(</span><span class="token string">&quot;C:/Users/Administrator/Desktop/test.txt&quot;</span><span class="token punctuation">)</span>
    <span class="token keyword">if</span> err <span class="token operator">!=</span> <span class="token boolean">nil</span> <span class="token punctuation">{</span> <span class="token comment">//&#x6709;&#x9519;&#x8BEF;</span>
        <span class="token keyword">if</span> os<span class="token punctuation">.</span><span class="token function">IsNotExist</span><span class="token punctuation">(</span>err<span class="token punctuation">)</span> <span class="token punctuation">{</span>
            fmt<span class="token punctuation">.</span><span class="token function">Println</span><span class="token punctuation">(</span><span class="token string">&quot;&#x6587;&#x4EF6;/&#x76EE;&#x5F55; &#x4E0D;&#x5B58;&#x5728;&#x3002;&#x3002;&#x3002;&quot;</span><span class="token punctuation">)</span>
        <span class="token punctuation">}</span><span class="token keyword">else</span> <span class="token punctuation">{</span>
            fmt<span class="token punctuation">.</span><span class="token function">Println</span><span class="token punctuation">(</span><span class="token string">&quot;&#x5176;&#x4ED6;&#x9519;&#x8BEF; &#x3002;&#x3002;&#x3002;&quot;</span><span class="token punctuation">)</span>
        <span class="token punctuation">}</span>
        <span class="token keyword">return</span>
    <span class="token punctuation">}</span>
    fmt<span class="token punctuation">.</span><span class="token function">Printf</span><span class="token punctuation">(</span><span class="token string">&quot;&#x6587;&#x4EF6;&#x540D;=%v \n&quot;</span><span class="token punctuation">,</span>info<span class="token punctuation">.</span><span class="token function">Name</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    fmt<span class="token punctuation">.</span><span class="token function">Printf</span><span class="token punctuation">(</span><span class="token string">&quot;&#x6587;&#x4EF6;&#x5927;&#x5C0F;=%v &#x5B57;&#x8282;\n&quot;</span><span class="token punctuation">,</span>info<span class="token punctuation">.</span><span class="token function">Size</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    fmt<span class="token punctuation">.</span><span class="token function">Printf</span><span class="token punctuation">(</span><span class="token string">&quot;&#x662F;&#x5426;&#x6587;&#x4EF6;&#x5939;=%v \n&quot;</span><span class="token punctuation">,</span>info<span class="token punctuation">.</span><span class="token function">IsDir</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
</code></pre>
<blockquote>
<p>&#x8BF4;&#x660E;&#xFF1A;&#x83B7;&#x53D6; &#x6587;&#x4EF6;/&#x6587;&#x4EF6;&#x5939; &#x4FE1;&#x606F;&#x7684;&#x65F6;&#x5019;&#xFF0C;&#x5982;&#x679C;&#x6709;&#x9519;&#xFF0C;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x9519;&#x8BEF;&#x4FE1;&#x606F;&#x3002;&#x5224;&#x65AD;&#x8FD9;&#x4E2A;&#x9519;&#x8BEF;&#x4FE1;&#x606F;&#x662F;&#x4E0D;&#x662F;os.IsNotExist &#x6765;&#x786E;&#x5B9A;&#x662F;&#x5426;&#x6587;&#x4EF6;&#x4E0D;&#x5B58;&#x5728;&#x5F15;&#x8D77;&#x7684;&#x9519;&#x8BEF;&#x3002;</p>
</blockquote>
<h3 id="&#x4E94;&#x3001;&#x62F7;&#x8D1D;&#x6587;&#x4EF6;&#x3002;"><a name="&#x4E94;&#x3001;&#x62F7;&#x8D1D;&#x6587;&#x4EF6;&#x3002;" class="anchor-navigation-ex-anchor" href="#&#x4E94;&#x3001;&#x62F7;&#x8D1D;&#x6587;&#x4EF6;&#x3002;"><i class="fa fa-link" aria-hidden="true"></i></a>1.1.5. &#x4E94;&#x3001;&#x62F7;&#x8D1D;&#x6587;&#x4EF6;&#x3002;</h3>
<p>&#x53EF;&#x4EE5;&#x4F7F;&#x7528; io &#x5305;&#x7684; <code>func Copy(dst Writer, src Reader) (written int64, err error)</code> &#x51FD;&#x6570;&#x5B9E;&#x73B0;&#x62F7;&#x8D1D;&#x6587;&#x4EF6;&#x3002;&#x8FD4;&#x56DE;&#x62F7;&#x8D1D;&#x7684;&#x5B57;&#x8282;&#x6570;&#xFF0C;&#x5982;&#x679C;&#x6709;&#x9519;&#x8BEF;&#x8FD4;&#x56DE;&#x9047;&#x5230;&#x7684;&#x7B2C;&#x4E00;&#x4E2A;&#x9519;&#x8BEF;&#x3002;</p>
<pre class="language-"><code class="lang-go"><span class="token comment">// &#x62F7;&#x8D1D;&#x6587;&#x4EF6;&#x7684;&#x51FD;&#x6570;</span>
<span class="token keyword">func</span> <span class="token function">CopyFile</span><span class="token punctuation">(</span>dstFileName <span class="token builtin">string</span><span class="token punctuation">,</span> srcFileName <span class="token builtin">string</span><span class="token punctuation">)</span> <span class="token punctuation">(</span>written <span class="token builtin">int64</span><span class="token punctuation">,</span> err <span class="token builtin">error</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    srcFile<span class="token punctuation">,</span> err <span class="token operator">:=</span> os<span class="token punctuation">.</span><span class="token function">Open</span><span class="token punctuation">(</span>srcFileName<span class="token punctuation">)</span>
    <span class="token keyword">if</span> err <span class="token operator">!=</span> <span class="token boolean">nil</span> <span class="token punctuation">{</span>
        fmt<span class="token punctuation">.</span><span class="token function">Printf</span><span class="token punctuation">(</span><span class="token string">&quot;&#x6253;&#x5F00;&#x6587;&#x4EF6;&#x5931;&#x8D25; err=%v\n&quot;</span><span class="token punctuation">,</span> err<span class="token punctuation">)</span>
        <span class="token keyword">return</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">defer</span> srcFile<span class="token punctuation">.</span><span class="token function">Close</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
    <span class="token comment">// &#x901A; &#x8FC7; srcfile , &#x83B7; &#x53D6; &#x5230; Reader</span>
    reader <span class="token operator">:=</span> bufio<span class="token punctuation">.</span><span class="token function">NewReader</span><span class="token punctuation">(</span>srcFile<span class="token punctuation">)</span>


    <span class="token comment">//&#x6253;&#x5F00; dstFileName</span>
    dstFile<span class="token punctuation">,</span> err <span class="token operator">:=</span> os<span class="token punctuation">.</span><span class="token function">OpenFile</span><span class="token punctuation">(</span>dstFileName<span class="token punctuation">,</span> os<span class="token punctuation">.</span>O_WRONLY <span class="token operator">|</span> os<span class="token punctuation">.</span>O_CREATE<span class="token punctuation">,</span> <span class="token number">0666</span><span class="token punctuation">)</span>
    <span class="token keyword">if</span> err <span class="token operator">!=</span> <span class="token boolean">nil</span> <span class="token punctuation">{</span>
        fmt<span class="token punctuation">.</span><span class="token function">Printf</span><span class="token punctuation">(</span><span class="token string">&quot;&#x6253;&#x5F00;&#x6587;&#x4EF6;&#x5931;&#x8D25; err=%v\n&quot;</span><span class="token punctuation">,</span> err<span class="token punctuation">)</span>
        <span class="token keyword">return</span>
    <span class="token punctuation">}</span>
    <span class="token comment">// &#x901A; &#x8FC7; dstFile, &#x83B7; &#x53D6; &#x5230; Writer</span>
    writer <span class="token operator">:=</span> bufio<span class="token punctuation">.</span><span class="token function">NewWriter</span><span class="token punctuation">(</span>dstFile<span class="token punctuation">)</span>
    <span class="token keyword">defer</span> dstFile<span class="token punctuation">.</span><span class="token function">Close</span><span class="token punctuation">(</span><span class="token punctuation">)</span>

    <span class="token keyword">return</span> io<span class="token punctuation">.</span><span class="token function">Copy</span><span class="token punctuation">(</span>writer<span class="token punctuation">,</span> reader<span class="token punctuation">)</span>
<span class="token punctuation">}</span>
<span class="token keyword">func</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token boolean">_</span><span class="token punctuation">,</span> err <span class="token operator">:=</span> <span class="token function">CopyFile</span><span class="token punctuation">(</span><span class="token string">&quot;C:/Users/Administ1rator/Desktop/dstFile.jpg&quot;</span><span class="token punctuation">,</span>
        <span class="token string">&quot;C:/Users/Administrator/Desktop/test.jpg&quot;</span><span class="token punctuation">)</span>
    <span class="token keyword">if</span> err <span class="token operator">!=</span> <span class="token boolean">nil</span> <span class="token punctuation">{</span>
        fmt<span class="token punctuation">.</span><span class="token function">Printf</span><span class="token punctuation">(</span><span class="token string">&quot;&#x62F7;&#x8D1D;&#x5931;&#x8D25; err=%v \n&quot;</span><span class="token punctuation">,</span> err<span class="token punctuation">)</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre>
<blockquote>
<p>&#x8BF4;&#x660E;&#xFF1A;&#x4E3B;&#x8981;&#x662F;&#x6253;&#x5F00;&#x6587;&#x4EF6;&#xFF0C;&#x5E76;&#x4E14;&#x628A;&#x6E90;&#x6587;&#x4EF6;&#x7684;Reader&#x3001;&#x76EE;&#x6807;&#x6587;&#x4EF6;&#x7684; Writer &#x4F20;&#x9012;&#x7ED9;io &#x5305;&#x7684;</p>
<p><code>func Copy(dst Writer, src Reader) (written int64, err error)</code>&#x51FD;&#x6570;</p>
</blockquote>

                                
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